Electronic display device automatically turns on or off according to whether a user in front of the display

Abstract

An electronic display device detects whether a user is in front of a display via a camera according to a first frequency in a working mode of the electronic display device. If the electronic display device detects that the user is not in front of the display for a first predefined time period, the electronic display device enters a power saving mode by turning off the display. The electronic display device detects whether the user is in front of the display again via the camera according to a second frequency in the power saving mode. The electronic display device reduces the second frequency after the user is not in front of the display for a second predefined time period. The electronic display device enters the working mode by turning on the display when detecting that the user is in front of the display again.

What is claimed is: 
     
       1. An electronic display device operable to work in a working mode or a power saving mode, the electronic display device comprising:
 a display operable to display working content; 
 a camera positioned on the display; 
 at least one processor; 
 a storage system to store one or more programs executable by the at least one processor, the one or more programs comprising:
 a detecting module operable to detect whether a user is in front of the display via the camera according to a first frequency in the working mode of the electronic display device; and 
 a mode adjusting module operable to enter the power saving mode by turning off the display when the detecting module detects that the user is not in front of the display for a first predefined time period; 
 wherein the detecting module is further operable to detect whether the user is in front of the display again via the camera according to a second frequency in the power saving mode, and further reduce the second frequency if the user is not in front of the display for a second predefined time period; 
 wherein the mode adjusting module is further operable to enter the working mode by turning on the display when the detecting module detects that the user is in front of the display again. 
 
 
     
     
       2. The electronic display device of  claim 1 , wherein the second frequency is less than the first frequency. 
     
     
       3. The electronic display device of  claim 1 , wherein the detection module detects whether a face of the user is in front of the display to determine whether the user is in front of the display. 
     
     
       4. A power saving method of an electronic display device with a display and a camera positioned on the display, the electronic display device working in a working mode or a power saving mode, the power saving method comprising:
 detecting whether a user is in front of the display via the camera according to a first frequency in the working mode of the electronic display device; and 
 entering the power saving mode by turning off the display if detecting that the user is not in front of the display for a first predefined time period; 
 detecting whether the user is in front of the display again via the camera according to a second frequency in the power saving mode; 
 reducing the second frequency after the user is not in front of the display for a second predefined time period; and 
 entering the working mode by turning on the display when detecting that the user is in front of the display again. 
 
     
     
       5. The power saving method of  claim 4 , wherein the second frequency is less than the first frequency. 
     
     
       6. The power saving method of  claim 4 , wherein detecting whether the user is in front of the display comprises: detecting whether a face of the user is in front of the display to determine whether the user is in front of the display.